In addition, excimer laser therapy results in no photo-damage to non-involved skin, given its targeted application. The Photomedex XTRAC® Velocity is the latest version of the excimer laser, which is 300-400% more powerful than its predecessor, the XTRAC® Ultra machine. This increased power makes treatment of generalized, moderate to severe psoriasis not only feasible but attractive. Time required for each treatment is decreased by one-third, as compared to the XTRAC® Ultra which was previously the most powerful excimer laser machine. XTRAC® Velocity is not yet available: it is scheduled to be introduced in a few months. With XTRAC® Velocity, it is expected that generalized psoriasis patients with 10-30% total body surface involvement can be treated in 10-15 minutes and great improvement can be achieved after approximately just ten laser treatment sessions.